ALTER "SEIRYU" -42T

Precision Engineered for Modern Gravel, Retro MTB & All-Terrain Rigs.

Forged from solid 7075-T6 aluminum alloy and fully CNC-machined in Taiwan, the ALTER "SEIRYU" (青龍) 110 BCD chainring is built to conquer rough terrain without compromising on strength or aesthetic.

Featuring our signature geometric drillings and deep-engraved CNC branding, the SEIRYU delivers exceptional lateral rigidity, flawless chain retention with its narrow-wide tooth profile, and an uncompromised Dark Mechanical visual presence. Compatible with 7 to 12-speed drivetrains.

Material: 7075-T6 Aluminum Alloy (Full CNC Machined)

BCD: 110mm (5-Bolt)

Tooth Profile: Narrow-Wide (1x Drivetrain)

Speed Compatibility: 7 to 12-Speed Compatible

Weight:

42T: 125g

Finishes: Anodized Black, Silver, Green, Hot Pink, Purple

Origin: Made in Taiwan